EP0378862B1 - Polymère greffé thermoplastique contenant des groupes oxétanyles - Google Patents

Polymère greffé thermoplastique contenant des groupes oxétanyles Download PDF

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Publication number
EP0378862B1
EP0378862B1 EP89124177A EP89124177A EP0378862B1 EP 0378862 B1 EP0378862 B1 EP 0378862B1 EP 89124177 A EP89124177 A EP 89124177A EP 89124177 A EP89124177 A EP 89124177A EP 0378862 B1 EP0378862 B1 EP 0378862B1
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EP
European Patent Office
Prior art keywords
graft
weight
und
acrylonitrile
alkyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP89124177A
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German (de)
English (en)
Other versions
EP0378862A3 (fr
EP0378862A2 (fr
Inventor
Dr. Piejko Karl-Erwin
Christian Dr. Lindner
Gerd Dr. Fengler
Hans-Eberhard Braese
Jürgen Dr. Kirsch
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Bayer AG
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Bayer AG
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
    • C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
    • C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L57/00—Compositions of unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds

Definitions

  • the invention relates to thermoplastic graft polymers containing oxetanyl groups and to thermoplastic molding compositions prepared from them.
  • Thermoplastic molding compositions which contain resinous polymers, for example styrene-acrylonitrile copolymers or methyl methacrylate polymers and graft polymers (for example ABS, MBS or ASA), are widely used for the production of moldings such as housings for electrical appliances, profiles and tubes by injection molding or extrusion.
  • the molding compound can be damaged by the high processing temperatures during the production of the shaped bodies. This can be recognized by discolouration, for example, and cannot be prevented entirely by stabilizers. Local overheating can also cause discoloration in some applications of the molded parts, for example as housings for household appliances. There is therefore a need for materials which have increased thermal stability and allow moldings with improved mechanical properties, in particular also after prolonged use, to be produced.
  • the graft polymers according to the invention are preferably partially crosslinked and have gel contents> 35% by weight, in particular from 60 to 95% by weight. They preferably contain 10-95 wt .-%, in particular 20 to 90 wt .-% rubber (A2).
  • the monomers A1.1 and A1.2 used to produce the graft shells A1 are known.
  • the particulate graft base (rubber base) A2 is preferably a mostly partially cross-linked diene or alkyl acrylate rubber produced by radical emulsion polymerization with average particle diameters (d50) of 80 to 800 nm, preferably 100 to 600 nm.
  • Diene rubbers are e.g. Polybutadiene, polyisoprene and copolymers of butadiene with up to 35% by weight of comonomers such as styrene, acrylonitrile, methyl methacrylate, C1-C6 alkyl acrylate.
  • Acrylate rubbers are e.g.
  • comonomers such as styrene, methyl methacrylate, butadiene, vinyl methyl ether, acrylonitrile and at least one polyfunctional crosslinking comonomer, e.g. Divinylbenzene, glycol bis
  • the multiphase acrylate rubbers described in DE-OS 3,200,070 which consist of a strongly cross-linked core made of diene rubber and a shell made of cross-linked acrylate rubber (rubber with a core-shell structure), are also advantageously suitable.
  • the multi-phase acrylic rubbers contain in particular 0.5-10, preferably 2-4% by weight of diene rubber (as core).
  • the rubbers A2 have gel contents (as a measure of the crosslinking) of greater than 35% by weight, preferably from 60 to 95% by weight.
  • the graft polymers according to the invention can be prepared by known processes by aqueous emulsion polymerization with free-radical initiators at temperatures from 50 to 90 ° C.
  • Suitable initiators are, for example, persulfate, perphosphate, hydroperoxides or azo compounds. Inorganic, water-soluble initiators are preferred.
  • Anionic emulsifiers of the carboxylic acid salt type e.g. Salts of oleic acid, stearic acid, resin acids, abietic acid and their disproportionated derivatives are also used.
  • the polymerization process used must ensure that the oxethanyl groups are retained (for example, strongly acidic (pH ⁇ 1) and strongly alkaline (pH> 12) milieu and higher temperatures must be avoided in emulsion polymerization).
  • Copolymers containing oxethanyl groups which have been produced in a weakly alkaline medium in aqueous dispersion, are particularly suitable.
  • Component 2) can be a polymer of one or more monomers A1). Polystyrene, polymethyl methacrylate, polyvinyl chloride, styrene-acrylonitrile copolymers are preferred; ⁇ -methylstyrene-acrylonitrile copolymers and ⁇ -methylstyrene-acrylonitrile-methyl methacrylate copolymers.
  • Component 2) can also be a graft polymer of vinyl monomers on a rubber. Rubbers particularly suitable as a graft base are diene rubbers, alkyl acrylate rubbers, olefin rubbers and silicone rubbers. The graft monomers polymerized in their presence are again preferably the vinyl monomers A1).
  • Preferred graft polymers are at least partially crosslinked and have a particulate structure with average particle diameters of 100 to 3000 ⁇ m, preferably 100 to 1000 ⁇ m.
  • thermoplastically processable rubbers for example natural rubber, olefin rubbers such as EPDM, ethylene vinyl acetate copolymers, Acrylate rubber, diene / styrene block copolymers and their hydrogenation products.
  • Very particularly preferred molding compositions for the purposes of the invention consist of a graft polymer with oxetanyl groups, polyvinyl chloride, an ABS or MBS graft polymer and, if appropriate, a thermoplastic styrene or ⁇ -methylstyrene copolymer.
  • compositions can contain the usual additives, such as lubricants and mold release agents, nucleating agents, stabilizers, fillers, reinforcing materials, flame retardants, dyes and thermal stabilizers, antioxidants and / or light stabilizers. These additives are used in the customary amounts, generally up to 30% by weight, but occasionally up to 60% by weight (especially in the case of fillers).
  • the molding compositions can be obtained in a conventional manner by mixing the components. Glass fibers are particularly suitable fillers, since such molding compositions, despite the presence of glass fibers, have advantageous surface properties after shaping.
  • the molding compositions are suitable for the production of moldings or molded parts of any kind. They generally have greater stability against aging due to environmental influences, chemicals, thermal stress and melt flow shear during thermoplastic processing and shaping.
  • the improved stability is also reflected in improved properties such as color, shorter processing cycle, long-term stability in use, low content of impurities and by-products, better gloss, better mechanical properties.
  • Graft polymer made from 50% by weight of polybutadiene with an average particle diameter (d50 value) of 380 nm (graft base) and 50% by weight of a graft-polymerized mixture of styrene and acrylonitrile (weight ratio 72/28) as a graft (produced by emulsion polymerization).
  • Copolymer of styrene and acrylonitrile in a weight ratio of 72:28 produced by aqueous emulsion polymerization.
  • the polymer has an L value of 81.
  • Terpolymer containing oxetanyl groups prepared by aqueous emulsion polymerization of a monomer mixture of styrene, acrylonitrile and the compound (Ia) in a weight ratio of 67: 28: 5, with the sodium salt of the disproportionated abietic acid as emulsifier at pH 10.
  • the polymer was isolated by coagulation of the polymer latex with an aqueous magnesium sulfate-sodium acetate-acetic acid solution (pH 4.2) and customary workup.
  • the polymer has an L value of 94.
  • Terpolymer containing oxetanyl groups prepared by aqueous emulsion polymerization of a monomer mixture of styrene, acrylonitrile and the compound (Ia) in a weight ratio of 62:28:10, with the sodium salt of disproportionated abietic acid as an emulsifier at pH 10.
  • the polymer was isolated by coagulation of the polymer latex with an aqueous magnesium sulfate-sodium acetate-acetic acid solution (pH 4.29) and usual work-up.
  • the polymer has an L value of 97.
  • Thermoplastic molding compositions are produced by mixing the components as indicated in Table 1 in a 1.3 l internal kneader at approx. 200 ° C. After injection molding into test specimens, impact strength and notched impact strength were determined at room temperature and at -40 ° C. according to ISO 179 (unit: kJ / m2). In addition to the components listed in Table 1, all molding compositions contain 0.1 part by weight of a silicone oil and 2 parts by weight of pentaerythritol tetrastearate as additives. The surface quality was assessed on flat plates measuring 60 x 40 x 2 mm.
  • Table 1 shows that polymers containing oxetane groups give molding compositions which have improved impact and notched impact strengths.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Graft Or Block Polymers (AREA)
  • Macromonomer-Based Addition Polymer (AREA)

Claims (2)

  1. Copolymères greffés comprenant
    A.1 des enveloppes de greffage formées de copolymères
    A.1.1 de styrènes, d'α-méthylstyrènes, d'acrylonitrile, d'acides vinyl-carboxyliques en C₁ à C₄, d'acrylates et/ou de méthacrylates d'alkyle en C₁ à C₈, de dérivés d'acide maléique, de chlorure de vinyle (vinylidène) et de mélanges de ces monomères d'une part et
    A.1.2 de monomères de formule I
    Figure imgb0009
     dans laquelle
    R¹   représente H ou CH₃,
    R²   représente un groupe alkylène en C₁ à C₈,
    R³   représente un groupe alkyle en C₁ à C₄,
    d'autre part, et
    A.2 des substrats de greffage formés de caoutchoucs diéniques et/ou de caoutchoucs d'acrylate en particules ayant des diamètres (d₅₀) de 80 à 800 nm.
  2. Compositions à mouler thermoplastiques, contenant des polymères greffés suivant la revendication 1 et, le cas échéant, d'autres polymères thermoplastiques ou polymères greffés.
EP89124177A 1989-01-14 1989-12-30 Polymère greffé thermoplastique contenant des groupes oxétanyles Expired - Lifetime EP0378862B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3901031 1989-01-14
DE3901031A DE3901031A1 (de) 1989-01-14 1989-01-14 Oxetanylgruppen enthaltende thermoplastische pfropfpolymerisate

Publications (3)

Publication Number Publication Date
EP0378862A2 EP0378862A2 (fr) 1990-07-25
EP0378862A3 EP0378862A3 (fr) 1991-11-06
EP0378862B1 true EP0378862B1 (fr) 1994-03-16

Family

ID=6372127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89124177A Expired - Lifetime EP0378862B1 (fr) 1989-01-14 1989-12-30 Polymère greffé thermoplastique contenant des groupes oxétanyles

Country Status (5)

Country Link
US (1) US5252674A (fr)
EP (1) EP0378862B1 (fr)
JP (1) JPH02232213A (fr)
DE (2) DE3901031A1 (fr)
ES (1) ES2063111T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4000233A1 (de) * 1990-01-06 1991-07-11 Bayer Ag Formmassen mit oxetanylgruppen
DE102005037892A1 (de) * 2005-08-10 2007-02-15 Ashland-Südchemie-Kernfest GmbH Cold-Box Bindemittel unter Verwendung von Oxetanen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5438278B2 (fr) * 1971-09-20 1979-11-20
US4707512A (en) * 1984-07-16 1987-11-17 Mitsubishi Chemical Industries Limited Polyester resin composition
US4772496A (en) * 1985-06-15 1988-09-20 Showa Denko Kabushiki Kaisha Molded product having printed circuit board
US4806613A (en) * 1988-03-29 1989-02-21 Morton Thiokol, Inc. Method of producing thermoplastic elastomers having alternate crystalline structure for use as binders in high-energy compositions
DE4000233A1 (de) * 1990-01-06 1991-07-11 Bayer Ag Formmassen mit oxetanylgruppen

Also Published As

Publication number Publication date
ES2063111T3 (es) 1995-01-01
JPH02232213A (ja) 1990-09-14
EP0378862A3 (fr) 1991-11-06
US5252674A (en) 1993-10-12
DE3901031A1 (de) 1990-07-19
EP0378862A2 (fr) 1990-07-25
DE58907241D1 (de) 1994-04-21

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